The term used for when a golf course is at full capacity. Usually a term used by employees to describe the course situation to customers. Originated from the english words Jarred and Ville.

*phone rings*
Employee "good afternoon, Marky speaking"
Customer "hi, do you have anything for a two some in 30 minutes?"
Employee "sorry sir, its fucking jarsville here today"
Customer " so you can't even squeeze in a two ball?"
employee " like i said sir, it looks like J town out there"
Customer "thanks, i will try another day"